Method and apparatus for producing integral skin polyurethane foam
US5449698A · kind A · utility
9Cited by
15References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1992 |
| Grant date | Sep 12, 1995 |
| Priority date | — |
| Expiry date | Sep 18, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/812
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed herein is a process for producing an integral skin polyurethane foam which comprises expanding a reacting mixture containing substantially no blowing agent in an evacuated mold cavity. Disclosed also herein is an apparatus for producing said an integral skin polyurethane foam which comprises a mold having a cavity and a vent hole, a vacuum chamber communicating with the cavity through the vent hole, a vacuum pump to evacuate the cavity through the vacuum chamber, and a sight glass attached to the vacuum chamber so as to make the vicinity of the vent hole visible from the outside of the vacuum chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.